EP1192337B1 - Ventilaufnahmevorrichtung für ein dosierventil einer abgasnachbehandlungsanlage - Google Patents
Ventilaufnahmevorrichtung für ein dosierventil einer abgasnachbehandlungsanlage Download PDFInfo
- Publication number
- EP1192337B1 EP1192337B1 EP00925066A EP00925066A EP1192337B1 EP 1192337 B1 EP1192337 B1 EP 1192337B1 EP 00925066 A EP00925066 A EP 00925066A EP 00925066 A EP00925066 A EP 00925066A EP 1192337 B1 EP1192337 B1 EP 1192337B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- heat
- valve seat
- metering valve
- metering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
- F01N2260/024—Exhaust treating devices having provisions not otherwise provided for for cooling the device using a liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/6416—With heating or cooling of the system
- Y10T137/6579—Circulating fluid in heat exchange relationship
Definitions
- the invention relates to a valve receiving device for a Dosing valve of an exhaust aftertreatment system according to the preamble of claim 1.
- Diesel internal combustion engines and lean-burn gasoline internal combustion engines in which fuel is injected directly into the combustion chamber in the cylinder, tend to high NO x emissions because of the high oxygen excess, with which they are operated.
- SCR selective catalytic reduction
- a reducing agent is introduced into the exhaust gas stream, which converts the nitrogen oxides contained in the exhaust gas in the presence of oxygen on the reduction catalyst to harmless nitrogen N 2 and water H 2 O.
- a metering device is preferably a conventional Injection valve, as for example in a low-pressure gasoline injection system Use finds.
- an injector Metaling valve
- reducing agent e.g. aqueous To inject urea solution
- the geometry of the outlet opening the valve is opposite to the fuel metering adjusted smaller amounts to be ejected.
- the exhaust gas temperatures can under unfavorable conditions Place the dosing valve to reach more than 500 ° C, which is negative Influences on the reducing agent to be introduced and also can follow the metering valve itself.
- the metering valve receiving adapter must therefore a high temperature gradient between exhaust pipe and metering valve allow, so that despite the valve installation on the hot exhaust pipe the most efficient cooling possible can.
- DE 44 36 397 A1 is for introducing a reducing agent in the exhaust gas supplied to the reduction catalyst provided an electrically controlled metering valve, which in a common housing combined with a control valve is.
- the control valve is used for the controlled introduction of supplied compressed air, in the upstream of the metering valve Amount of reducing agent processed, intermittent is entered into the exhaust gas.
- the control valve and the metering valve are arranged in a common carrier body, of cooling water from the cooling water circuit of Internal combustion engine is flowed around.
- DE 38 24 954 A1 is a cleaning system for the Exhaust gases of an internal combustion engine with arranged in a housing Catalyst, an exhaust pipe between the internal combustion engine and the catalyst described in which Heat pipe whose evaporation zone fed to the catalyst Exhaust gas extracts heat and this over a in one Low temperature environment condensation zone emits.
- the evaporation zone of the unregulated heat pipe is while in the exhaust pipe upstream of the catalyst housing arranged.
- the invention is therefore based on the object, a simple constructed receiving device for a metering valve an exhaust aftertreatment facility for one with excess air operated internal combustion engine of the type mentioned specify at which the thermal load of the metering valve and the reducing agent is as low as possible.
- an unregulated heat pipe also called heat pipe referred to in the valve cradle to Transport of the waste gas acting on the metering valve from the exhaust gas to a condensation zone that is lower in an environment Temperature, it is easily possible to cool the dosing valve and a chemical change to prevent the reducing agent due to the high temperatures.
- a cavity in the valve receiving device used as a cooling ring includes the metering valve tip and that with a liquid filled, is in fluid communication with a heat sink, e.g. a heat sink, which is used to increase the Surface and thus to increase the cooling effect with ribs is provided.
- a heat sink e.g. a heat sink
- Such an arrangement has the advantage that no separate Coolant circuit or components for active cooling (Blower, coolant pump), including electrical or hydraulic elements are necessary. It has no moving Parts up, is completely maintenance free and may be due its simplicity can be used cost effectively.
- the Heat sink can be easily integrated into the vehicle, because the form largely adapted to the installation conditions and only a relatively small amount of heat per unit of time must be removed.
- a particularly efficient cooling of the metering valve results if the heat sink is designed as a heat sink, the is arranged at a location in the vehicle, either from Wind or flowed by the air flow of the radiator fan becomes.
- To increase the cooling capacity can also be several heat pipes be provided on the valve receiving device, either all connected to a common heatsink, or a heat sink is assigned to each heat pipe.
- Figure 1 is very simplified in the form of a block diagram an operated with excess air internal combustion engine shown with an associated exhaust aftertreatment system. Only those parts are shown, which are for the understanding of the invention are necessary. Especially is dispensed with the representation of the fuel circuit Service.
- this embodiment is as an internal combustion engine a diesel engine shown and as a reducing agent for post-treatment of the exhaust gas is aqueous Urea solution used.
- the internal combustion engine 1 is via a suction line 2 the supplied necessary for combustion air.
- An injection system for example, as a high-pressure storage injection system (Common rail) be formed with injection valves can, the fuel KST directly into the cylinder of the internal combustion engine Injecting 1 is designated by the reference numeral 3 designated.
- the exhaust gas of the internal combustion engine 1 flows over an exhaust pipe 4 to an exhaust aftertreatment system 5 and from this via a silencer, not shown in the Free.
- a per se known engine control unit 6 For controlling and regulating the internal combustion engine 1 is a per se known engine control unit 6 via a here only schematically illustrated data and control line 7 with the Internal combustion engine 1 connected.
- Data - and Control line 7 are signals from sensors (e.g., temperature sensors for intake air, charge air, coolant, load sensor, Speed sensor) and signals for actuators (e.g., injectors, Actuators) between the internal combustion engine 1 and the engine control unit 6 transmitted.
- sensors e.g., temperature sensors for intake air, charge air, coolant, load sensor, Speed sensor
- actuators e.g., injectors, Actuators
- the exhaust aftertreatment system 5 has a reduction catalyst 8 on, the several series-connected catalyst units 81.82 includes. Downstream and / or upstream of the reduction catalyst 8 may additionally each one Oxidation catalyst may be arranged. Furthermore, a dosing control unit 9 provided that a reducing agent reservoir 10 with an electrically controllable feed pump eleventh is assigned for the reducing agent.
- urea aqueous solution stored in the reducing agent storage tank 10 is used.
- This has an electric heater 12 and sensors 13,14, which detect the temperature of the urea solution or the level in the reducing agent reservoir 10.
- the signals of a temperature sensor arranged upstream of the reduction catalytic converter 8 and of an exhaust gas measuring sensor arranged downstream of the reduction catalytic converter 8, for example a NO x sensor are also transferred to the dosing control device 9 (not shown).
- the metering control unit 9 controls an electromagnetic metering valve 15 to, if necessary, via a line 16 urea solution with the help of the pump 11 from the reducing agent reservoir 10 is supplied.
- the injection of Urea solution by means of the metering valve 15 takes place in the Exhaust pipe 4 upstream of the reduction catalyst. 8
- the metering control unit 9 is for mutual data transfer via an electric bus system 17 with the engine control unit 6 connected.
- the bus system 17 are the for calculation the quantity of urea solution to be metered, relevant operating parameters, such as. Engine speed, air mass, Fuel mass, control path of an injection pump, exhaust gas mass flow, Operating temperature, charge air temperature, start of injection etc. passed to the dosing control unit 9.
- the metering control unit 9 calculates the amount of urea solution to be injected and delivers a corresponding electrical signal to the metering valve 15 via an electrical connecting line 18.
- the urea is hydrolyzed and mixed.
- the catalytic reduction of the NO x in the exhaust gas to N 2 and H 2 O.
- metering valve 15 for introducing the urea solution into the Exhaust pipe 4 is usually a conventional low-pressure gasoline injector, in one with a wall of the exhaust pipe 4 permanently connected valve receiving device detachable is attached.
- valve receiving device 19 including the Valve receiving device 19 shown in more detail, wherein the Metering valve 15 uncut and the valve receiving device 19 is shown partially cut.
- This valve receiving device 19 is fixed on an outer wall 191 connected to the wall 41 of the exhaust pipe 4, in the case a metallic valve receiving device 19 e.g. With this welded.
- the valve receiving device 19 of ceramic and / or at least the of Exhaust pipe facing away parts of temperature-resistant plastic consist.
- the material used is on the one hand a be poor heat conductor, so that as little heat from Exhaust and the exhaust pipe 4 passes to the metering valve 15 and on the other hand a sufficiently high mechanical strength have to receive the metering valve 15 and also in Operation of the internal combustion engine 1 to keep safe.
- the metering valve 15 is in the valve receiving device 19th inserted and by means of a suitable screw or Clamping device 192 held securely, so that the metering valve 15 is centered in the radial and axial directions.
- the valve receiving device 19 has for this purpose at its the Exhaust pipe 4 side facing away from the diameter of the Dosage valve body 151 adapted recess 193, so that in the inserted state, the metering valve tip 152 with its exit 153 just before or at the level of a passage opening provided for the urea solution Wall 41 of the exhaust pipe 4 is located.
- the metering valve tip 152 seals at one in the valve receiving device 19 molded cone 194 to the exhaust down.
- the valve receiving device 19 which includes the metering valve tip 152, designed as a heat exchanger housing.
- This is one, by an outer wall 195 and an inner wall 196 limited cooling ring 197 is provided, wherein the inner wall 196 in direct spatial contact with the surface the metering valve tip 152 is and thus a heat exchange wall forms, while the cavity 198 of the cooling ring 197 with a liquid medium is filled.
- metering valve tip 152 and cooling ring 197 may also be an intermediate layer, e.g. be introduced a film.
- a heat pipe 20 (heat pipe) is on the one hand in fluid communication with the cavity 198 of the cooling ring 197 and ends on the other in a heat sink 21, which is spatially removed from the Dosing valve 15 and the exhaust pipe 4 within the with the Internal combustion engine driven vehicle is arranged.
- the heat sink 21 is, for example, on a shielding plate 22 fastened, fixed to the valve receiving device 19th or is connected to the exhaust pipe 4 and the radiant heat the hot exhaust pipe 4 from both the heat pipe 20, as well as away from the heat sink 21.
- it is ensured by the valve receiving device 19, the heat pipe 20, the heat sink 21 and the exhaust pipe 4 a over the vehicle body spring-suspended, form oscillatory structures.
- the heat sink 21 has a plurality of cooling ribs or cooling vanes 211 on. To increase the cooling effect it is too possible to arrange the heat sink 21 at a location in the vehicle, at the he either from the wind or at least partly from the air flow for cooling the internal combustion engine 1 existing fan is flown.
- Is used as a reducing agent aqueous urea solution, as a liquid for the heat pipe 20 is a cooling medium chosen, which at about 60 ° C and at this temperature boiling pressure with high heat of evaporation boils. Through the boiling process and the heat of evaporation consumed the cooling ring 197 will be around the metering valve tip 152 cooled very efficiently.
- the evaporated cooling medium condenses with release of the heat of vaporization in the heat pipe 20, which is in the heat sink 21 and flows back into the Cooling ring 197 in the valve receiving device.
- water is the cooling medium very suitable because the boiling point at a pressure is about 0.2 bar in this temperature range and water has a relatively high heat of evaporation.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Lift Valve (AREA)
- Sampling And Sample Adjustment (AREA)
Description
- Figur 1
- eine Blockdarstellung einer Brennkraftmaschine mit zugehöriger Abgasnachbehandlungsanlage, bei der die erfindungsgemäße Aufnahmevorrichtung eingesetzt wird und
- Figur 2
- eine schematische Darstellung eines Ausführungsbeispieles der erfindungsgemäßen Aufnahmevorrichtung.
Claims (15)
- Ventilaufnahmevorrichtung zur Aufnahme eines, zum gesteuerten Einbringen von flüssigem Reduktionsmittel in das Abgas einer Brennkraftmaschine stromaufwärts eines Reduktionskatalysators dienenden Dosierventils, wobei die Ventilaufnahmevorrichtung eine Einrichtung zur Kühlung des Dosierventils aufweist,
dadurch gekennzeichnet, daßdie Ventilaufnahmevorrichtung (19) mindestens ein mit Flüssigkeit gefülltes, ungeregeltes Wärmerohr (20) mit einer Verdampfungszone und einer Kondensationszone beinhaltet,die Verdampfungszone dem Dosierventil (15) an dessen das Reduktionsmittel ausstoßenden Ende (152) die vom Abgas zugeführte Wärme entzieht und das die Wärme an einen, vom Dosierventil (20) beabstandeten, in einer Umgebung niedrigerer Temperatur liegenden Kühlkörper (21) durch Kondensation abgibt. - Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daßdie Ventilaufnahmevorrichtung (19) einen, durch eine äußere und innere Wandung (195,196) gebildeten Hohlraum (198) aufweist,die innere Wandung (195) zumindest einen Teil des Dosierventils (15) umschließt, so daß eine Wärmetauschwand gebildet ist,der Hohlraum (198) mit einer Flüssigkeit gefüllt ist und über das Wärmerohr (20) in Fließverbindung mit dem Kühlkörper (21) steht.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mehrere Wärmerohre (20) vorgesehen sind, die eine gemeinsame Verdampfungszone aufweisen und alle mit demselben Kühlkörper (21) verbunden sind.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mehrere Wärmerohre (20) vorgesehen sind, und jedem Wärmerohr (20) ein eigener Kühlkörper (21) zugeordnet ist.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kühlkörper (21) an einer Stelle angeordnet ist, an der seine Oberfläche von dem Fahrtwind eines mit der Brennkraftmaschine ausgestatteten Fahrzeugs oder zumindest teilweise vom Luftstrom eines die Brennkraftmaschine kühlenden Lüfters angeströmt wird.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Wärmerohr (20) mit einer Flüssigkeit gefüllt ist, deren Siedepunkt etwas unterhalb der kritischen Temperatur des mit dem Dosierventil (15) einzubringenden Reduktionsmittels liegt.
- Vorrichtung nach Anspruch 1 oder 6, dadurch gekennzeichnet, daß das Wärmerohr (20) mit Wasser gefüllt ist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Verdampfungszone als Kühlring (197) ausgebildet ist, der die Dosierventilspitze (152) unmittelbar umfasst.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Verdampfungszone als Kühlring (197) ausgebildet ist und zwischen dem Kühlring (197) und der Dosierventilspitze (152) ein den Wärmeübergang zwischen diesen Teilen verbessernde Zwischenlage eingebracht ist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Kühlkörper (21) an einem Abschirmblech (23) montiert ist, das ihn gegen die Strahlungswärme der heissen Abgasleitung (4) abschirmt.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Dosierventil (15) in der Ventilaufnahmevorrichtung (19) mittels einer Klemmvorrichtung gehalten wird, so daß eine Verschiebung in axialer und radialer Richtung verhindert wird.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Dosierventil (15) in der Ventilaufnahmevorrichtung (19) mittels einer Verschraubung gehalten wird, so daß eine Verschiebung in-axialer und radialer Richtung verhindert wird.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ventilaufnahmevorrichtung (19) aus metallischen Werkstoffen besteht.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Ventilaufnahmevorrichtung (19) aus keramischem Werkstoff besteht.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Ventilaufnahmevorrichtung (19) zumindest teilweise aus temperaturbeständigem Kunststoffmaterial besteht.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19919426A DE19919426C1 (de) | 1999-04-28 | 1999-04-28 | Ventilaufnahmevorrichtung für ein Dosierventil einer Abgasnachbehandlungsanlage |
DE19919426 | 1999-04-28 | ||
PCT/DE2000/000999 WO2000066885A1 (de) | 1999-04-28 | 2000-04-03 | Ventilaufnahmevorrichtung für ein dosierventil einer abgasnachbehandlungsanlage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1192337A1 EP1192337A1 (de) | 2002-04-03 |
EP1192337B1 true EP1192337B1 (de) | 2005-02-09 |
Family
ID=7906222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00925066A Expired - Lifetime EP1192337B1 (de) | 1999-04-28 | 2000-04-03 | Ventilaufnahmevorrichtung für ein dosierventil einer abgasnachbehandlungsanlage |
Country Status (8)
Country | Link |
---|---|
US (1) | US6513323B1 (de) |
EP (1) | EP1192337B1 (de) |
JP (1) | JP2002543337A (de) |
KR (1) | KR20020002439A (de) |
AT (1) | ATE289000T1 (de) |
DE (2) | DE19919426C1 (de) |
ES (1) | ES2235859T3 (de) |
WO (1) | WO2000066885A1 (de) |
Families Citing this family (95)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60117314T2 (de) * | 2000-03-31 | 2006-10-19 | Toyota Jidosha K.K., Toyota | Abgasemissions-Steuerungssystem für eine Brennkraftmaschine |
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DE3824954A1 (de) * | 1988-07-22 | 1989-07-20 | Daimler Benz Ag | Reinigungsanlage fuer die abgase einer brennkraftmaschine |
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DE19856366C1 (de) * | 1998-12-07 | 2000-04-20 | Siemens Ag | Vorrichtung und Verfahren zum Nachbehandeln von Abgasen einer mit Luftüberschuß arbeitenden Brennkraftmaschine |
-
1999
- 1999-04-28 DE DE19919426A patent/DE19919426C1/de not_active Expired - Fee Related
-
2000
- 2000-04-03 EP EP00925066A patent/EP1192337B1/de not_active Expired - Lifetime
- 2000-04-03 JP JP2000615491A patent/JP2002543337A/ja active Pending
- 2000-04-03 AT AT00925066T patent/ATE289000T1/de not_active IP Right Cessation
- 2000-04-03 KR KR1020017013736A patent/KR20020002439A/ko not_active Application Discontinuation
- 2000-04-03 US US09/980,986 patent/US6513323B1/en not_active Expired - Fee Related
- 2000-04-03 DE DE50009491T patent/DE50009491D1/de not_active Expired - Lifetime
- 2000-04-03 WO PCT/DE2000/000999 patent/WO2000066885A1/de not_active Application Discontinuation
- 2000-04-03 ES ES00925066T patent/ES2235859T3/es not_active Expired - Lifetime
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ES2235859T3 (es) | 2005-07-16 |
ATE289000T1 (de) | 2005-02-15 |
US6513323B1 (en) | 2003-02-04 |
KR20020002439A (ko) | 2002-01-09 |
DE19919426C1 (de) | 2000-03-30 |
JP2002543337A (ja) | 2002-12-17 |
WO2000066885A1 (de) | 2000-11-09 |
EP1192337A1 (de) | 2002-04-03 |
DE50009491D1 (de) | 2005-03-17 |
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